Device for simultaneous movementof double doors



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DEVICE POR-SIMULTANEOUS MOVEMENT 0F DOUBLE DOORS.. No. 376,947.

Y M... n] 1 MMM M. .ZM/ W /JW/ m M W N. PETERS. Phmp-miwgmpher. washington, EL'C y UNITED STATES PATENT OFFICE.-

BERNHARD I. H. DE VEY AND JOHN SOHREIBER, or CHICAGO, ILLINOIS..

DEVICE FOR SIMULTNEOUS MOVEMENT 0F DOUBLE DOORS.

SPECIFICATION forming peut of Letters Patent No. 376,947, dated January 24, 1888. v

' Application filed March 28, 1887. Serial No. 232.743. (No model.) y

To all whom it may concern:

Be it known that we, BERNHARD L'H. DE VRY and JOHN SOHREIBER, subjects of the Emperor of Germany, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvement's in vDevices for Simultaneous Movement of Double Doors, of which the following is a specification, reference being had therein to the accompanying drawings.

. This invention has for its object to provide a device for double or two-wing swinging doors by which the movement imparted .to one door will be transmitted to the other door, to move simultaneously therewith either for closing or opening; and it principally consists in connecting with the hinges of the two doors sprocket-wheels-one for each door-wing-and in a cross link-beltA stretched over the two wheels for transmitting the movement from one to the other; also, in the peculiar device ot' coupling the sprocket-wheels vwith the hinges of the door-wings, and in the novel combinations of parts for obtaining the desired result, all as will be more fully hereinafter described an'd specifically claimed.

In the accompanying drawings; vFigure 1 represents a sectional plan of swinging doors with our device attached; Fig. 2, a plan of the sprocketwheels and chain as placed below the threshold; Fig. 3, an elevation of the lower portions of the swinging doors and sprocketwheel attachments,and Fig. 4 asection showing the connection of one of the hinges with one of the sprocket-wheels.

Corresponding letters in the several figure of the drawings designate like parts.

G and G denote two swinging door-wings pivotally hung on hinges H and Hin the usual manner, only that for our purpose we provide 4o mitting a reversed movement from one to the f other in a manner that the swinging of one ydoor in one direction will impart to the other door a simultaneous movement in thcreverse direction. 1 It will be noticedthat as arranged the doors can be lifted and disconnected from the hinges Y of the door-frame the same as with 'any doorV and Without interfering with the sprocket# Two swinging door-Wings having squared f" extensions to their hinge-pivot pins, in como bination Vwith sprocket-wheels pivotally sccured under tliethreshold, having longhubsf.V with squared sockets for receiving thehinge pivot-pin extensions, and being connected by a cross-belt, substantial] y as set forth,*for the purpose specified;

In testimony whereof we affix our signatures in presence ot' two witnesses. Y

BERNHARD. I. II. DEOVRY. 'JOHN SCHREIBER. Witnesses:

WILLIAM H. Lorz, OTTO LUBKERT.

In this manner bothA wheels I I are 

